Genomewide Association Study of Severe Covid-19 with Respiratory Failure

Study shows that people with Type A blood have a higher risk of catching coronavirus and of developing severe symptoms, while people with Type O blood have a lower risk. People with Type A blood had a 45% higher risk of becoming infected than people with other blood types, and people with Type O blood were just 65% as likely to become infected as people with other blood types.

Link to study: https://www.nejm.org/doi/full/10.1056/NEJMoa2020283

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